A: Enter before means that you may enter into China before 24:00 on the expiring day specified on the visa that has valid Entries. Visas become invalid and can not be extended after the expiring date even if there are still Entries unused. You should apply for another visa. All visas come into effect on the date of issuance. Applicants should take all responsibility if the visas become invalid as a result of their decision to change journey plan. Applicants should check the Enter before on their visas before they depart for China.